update version and some docs

docs/configuring.rst

@@ -0,0 +1,22 @@
+Configuring PeakRDL-regblock
+============================
+
+If using the `PeakRDL command line tool <https://peakrdl.readthedocs.io/>`_,
+some aspects of the ``regblock`` command have additional configuration options
+avaiable via the PeakRDL TOML file.
+
+All regblock-specific options are defined under the ``[regblock]`` TOML heading.
+
+.. data:: cpuifs
+
+    Mapping of additional CPU Interface implementation classes to load.
+    The mapping's key indicates the cpuif's name.
+    The value is a string that describes the import path and cpuif class to
+    load.
+
+    For example:
+
+    .. code-block:: toml
+
+        [regblock]
+        cpuifs.my-cpuif-name = "my_cpuif_module:MyCPUInterfaceClass"

docs/index.rst

@@ -100,6 +100,7 @@ Links
     architecture
     hwif
     api
+    configuring
     limitations
     licensing